diencephalon

(noun)

the region of the human brain, specifically the human forebrain, that includes the thalamus, the hypothalamus, the epithalamus, the prethalamus or subthalamus, and the pretectum

Examples of diencephalon in the following topics:

Hypothalamic-Pituitary Axis
- The hypothalamus is an endocrine organ located in the diencephalon of the brain.
Establishing Body Axes during Development
- The prosencephalon further goes on to develop into the telencephalon (the forebrain or cerebrum) and the diencephalon (the optic vesicles and hypothalamus).